农业机械学报2025，Vol.56Issue(8)：52-61,10.DOI:10.6041/j.issn.1000-1298.2025.08.005
黄土高原农业区蒸散发时空演变与环境因子贡献研究
Spatiotemporal Evolution of Evapotranspiration and Contribution of Environmental Factors in Loess Plateau Agricultural Region
摘要
Abstract
The Loess Plateau agricultural area,a critical agricultural production zone in China,is characterized by severe water scarcity and ecological vulnerability.To support water resource management and ecological restoration,a systematic study was conducted on the spatiotemporal evolution of evapotranspiration(ET)and its driving mechanisms.Based on MODIS satellite data(2005-2020),key environmental factors were integrated,including leaf area index(LAI),precipitation(PRE),air temperature(Ta),soil moisture(SM),and surface solar radiation(SSR).The following results were obtained,the spatial distribution of annual and summer ET exhibited a northwest-to-southeast increasing gradient,with 91.46％and 88.41％of the area showing a significant upward trend(p＜0.05),respectively.The increasing trend of ET was found to be persistent,and summer ET variations were identified as the primary driver of annual ET changes.LAI and SM were demonstrated to dominate annual and summer ET variations,contributing 55.92％(annual)and 23.28％(summer),respectively.Additionally,SSR exerted a stronger influence on ET than PRE and Ta at the annual scale,whereas PRE played a more significant role in summer,indicating time-scale-dependent dominant factors.Vegetation restoration was shown to promote ecological recovery but might intensify water shortages.Thus,future strategies must account for water resource carrying capacity to balance ecological and hydrological sustainability.The research result can provide scientific insights into ET dynamics in the Loess Plateau agricultural area,offering a basis for regionally tailored water and ecosystem management.关键词
蒸散发(ET)/黄土高原农业区/环境因子/时空演变/岭回归算法Key words
evapotranspiration(ET)/Loess Plateau agricultural region/environmental factors/spatiotemporal evolution/ridge regression分类
农业科技引用本文复制引用
郑美君,查元源,杜帅..黄土高原农业区蒸散发时空演变与环境因子贡献研究[J].农业机械学报,2025,56(8):52-61,10.基金项目
国家自然科学基金项目(52479045、52279042)和广西科技计划项目(桂科AB23026021) （52479045、52279042）
